It is interesting to theorize about the cause(s) of autism. For me I've often wondered not only about the sex differences for the disease, most autistics being male as the article mentions, but also the large number of autistics reporting severe stomach problems. There is also some believing autism could be connected with chronic fatigue syndrome, and fibromyalgia.
I have an IBD stomach condition. That is my interest with autism and stomach disorders. IBD conditions are mostly a female problem. Some males develop IBD conditions but it is a rarer diagnosis. With IBD diseases not only can the stomach be upset, but a large number with IBD conditions experience chronic fatigue and mental fatigue. Some say chronic fatigue is the top complaint for IBD conditions, but opinions vary on that.
So I've often wondered if autism, IBD conditions, chronic fatigue syndrome and fibromyalgia, could be developing from the same source, possibly in the intestinal digestive system, but preventing differently in the sexes, and differently per individual. Just a guess.
I have an IBD stomach condition. That is my interest with autism and stomach disorders. IBD conditions are mostly a female problem. Some males develop IBD conditions but it is a rarer diagnosis. With IBD diseases not only can the stomach be upset, but a large number with IBD conditions experience chronic fatigue and mental fatigue. Some say chronic fatigue is the top complaint for IBD conditions, but opinions vary on that.
So I've often wondered if autism, IBD conditions, chronic fatigue syndrome and fibromyalgia, could be developing from the same source, possibly in the intestinal digestive system, but preventing differently in the sexes, and differently per individual. Just a guess.
I am in the camp that thinks it is genetic. DS #1 was diagnosed while I was pregnant with DS #2. Medical staff at Easter Seals told me there was 20% baby would also have autism, and he does. After living with this for a while I see pieces of autism in different branches of the family tree, I can see those genetic tendencies and with my kids it lined up just right to be full-blown autism. Of course maybe something in the environment "triggered" those genes, I don't know how that stuff all works. I would like to see more research on helping adults with autism live happy and independent lives. According Autism Speaks facebook post about 90% of adults with autism are unemployed. 
) and they've eaten plenty of foods stored, prepared, re-warmed in plastics. Maybe they just didn't have a predisposition? Or maybe it's not plastic? I would say that plastic (at a glance) makes more sense to me than vaccines and some other theories, just because the "timing" of increased diagnosis combined with increased use of plastics for food storage and cooking, etc, fits a bit better. But, I would have to see some serious science to convince me plastics caused autism.